Lines

3-D lines, or chords, are represented as zero-based, one-dimensional
arrays that contain two elements: the starting 3-D point and the
ending 3-D point. A 3-D line can be constructed in a number of different
ways. For example,

Dim arrStartPoint, arrEndPoint,
arrLine

arrStartPoint = Array(1.0, 2.0,
3.0)

arrEndPoint = Array(4.0, 5.0,
6.0)

arrLine = Array(arrStartPoint,
arrEndPoint)

RhinoScript contains a number of methods to manipulate lines. See
Lines and Planes
for details.